Rotated empirical orthogonal decomposition-based irradiance area division method

An area division method and a technique of empirical orthogonal decomposition, applied in the field of solar year total radiation analysis, which can solve the problems of poor environmental protection, poor stability, and low energy conversion efficiency.

Inactive Publication Date: 2014-06-18
STATE GRID CORP OF CHINA +2
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Problems solved by technology

[0004] In the process of realizing the present invention, the inventor found that there are at least defects such as poor stability, low energy conversion efficiency and poor environmental protection in the prior art

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  • Rotated empirical orthogonal decomposition-based irradiance area division method
  • Rotated empirical orthogonal decomposition-based irradiance area division method
  • Rotated empirical orthogonal decomposition-based irradiance area division method

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Embodiment Construction

[0048] The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0049] Empirical Orthogonal Function (EOF for short) decomposition is a linear combination that decomposes the original variable field into orthogonal functions, forming a small number of uncorrelated typical modes, replacing the original variable field, each Typical modes all contain as much original field information as possible. In order to further highlight the local features, the Rotated Empirical Orthogonal Function (REOF for short) is used for objective partitioning.

[0050] According to an embodiment of the present invention, such as figure 1 with figure 2 As shown, a method of irradiance area division based on rotational empirical orthogonal decompositi...

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Abstract

The invention discloses a rotated experience orthogonal decomposition-based irradiance area division method which mainly comprises the steps of performing standardized matrix averaging on annual total radiation amount data; performing EOF (experience orthogonal function) decomposition on an annual total radiation variable field matrix based on the standardized matrix averaging result of the annual total radiation amount data; based on the EOF decomposition result of the annual total radiation variable field matrix, rotating a load matrix and a factor matrix according to a varimax orthogonal rotation principle, and respectively calculating a variance contribution rate and an accumulative variance contribution rate; dividing irradiance areas according to the calculation results of the variance contribution rate and the accumulative variance contribution rate. By adopting the rotated experience orthogonal decomposition-based irradiance area division method, the defects of poor stability, low energy conversion efficiency, poor environmental friendliness and the like in the prior art can be overcome to realize the advantages of good stability, high energy conversion efficiency and good environmental friendliness.

Description

technical field [0001] The invention relates to the field of annual total solar radiation analysis for photovoltaic power generation, in particular to a method for dividing irradiance regions based on rotational empirical orthogonal decomposition. Background technique [0002] According to relevant statistics, the National Development and Reform Commission has planned more than ten million-kilowatt photovoltaic power generation bases in Qinghai, Gansu and other provinces. At present, my country has entered a period of rapid development of photovoltaic power generation. In 2012, the photovoltaic power generation capacity of the national grid dispatching scope was 3.568 billion kwh, a year-on-year increase of 466%. [0003] Taking Gansu as an example, as of November 2013, Gansu's grid-connected photovoltaic power generation capacity has exceeded 2 million kilowatts, becoming the second largest emerging energy after wind power. As we all know, photovoltaic power generation con...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06Q50/06
CPCG01W1/12G01J1/42
Inventor 汪宁渤路亮周强王定美程序刘光途吕清泉陈钊
Owner STATE GRID CORP OF CHINA
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